• Polarity: To configure A and V sensing, the OPTIMIZER Smart IPG
provides the following options:
o Bipolar: The signal between lead “tip” (distal electrode) and “ring”
(proximal electrode) of a bipolar lead is sensed.
o Unipolar: The signal between lead tip (distal electrode) and the case
of the OPTIMIZER Smart IPG is sensed.
9.3.3 Refractory Period
The Refractory period is the time interval when the OPTIMIZER Smart IPG does
not detect input events. The refractory period is applicable to the right heart
sensing:
• Refractory: Signals sensed within this period after an atrial or ventricular
event do not register as atrial or ventricular events. With the OMNI Smart
Programmer software, the A/V refractory period can be set to values
between 148 ms and 453 ms, in 8 ms increments.
9.4 CCM Delivery Options
The implantable OPTIMIZER Smart IPG features three CCM delivery scheduling
options:
• CCM OFF: No CCM signal delivery
• Timed: The device is programmed to deliver CCM therapy within the time frame
between Start Time (default: 0:00) and End Time (default: 23:59). The default
configuration in the USA is for 1 hour ON Time followed by 3:48 hours OFF
Time, repeatedly, to produce 5 hours of programmed CCM therapy per day. The
default setting for CCM therapy delivery outside the USA is 7 hours per day.
Note: An ON phase is started after each charging process. The timer will resume
the normal program on the following midnight.
• Continuous: Continuous CCM signal delivery (for testing purposes only)
9.5 CCM Signal Delivery
This section describes how the implantable OPTIMIZER Smart IPG applies the CCM
signals to the cardiac tissue during the absolute refractory period.
9.5.1 Channels
CCM signals that are generated by the signal generation circuitry of the
OPTIMIZER Smart IPG can either be applied through one of the following
channels or through a combination of these channels:
• V lead
• LS lead
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